30820019 has 2 divisors, whose sum is σ = 30820020. Its totient is φ = 30820018.

The previous prime is 30820003. The next prime is 30820051. The reversal of 30820019 is 91002803.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30820019 - 2⁴ = 30820003 is a prime.

It is a super-2 number, since 2×30820019² = 1899747142320722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30819976 and 30820003.

It is not a weakly prime, because it can be changed into another prime (30820079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15410009 + 15410010.

It is an arithmetic number, because the mean of its divisors is an integer number (15410010).

Almost surely, 2^30820019 is an apocalyptic number.

30820019 is a deficient number, since it is larger than the sum of its proper divisors (1).

30820019 is an equidigital number, since it uses as much as digits as its factorization.

30820019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 30820019 is about 5551.5780639382. The cubic root of 30820019 is about 313.5289399062.

The spelling of 30820019 in words is "thirty million, eight hundred twenty thousand, nineteen".